Motor-accelerating device.



E. L. GALE, SR. MOTOR AGOELBRATING DEVICE.

APILIOATIOR FILED NOV. 9. 1909.

Patented June 10, 1913.

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iii/(2 2U MJWAA E. L. GALE, SB- MOTOR AGCELEBATING DEVICE.

APPLIOATION FILED NOV. 9, 1909.

1,064,205,v Patented June 10,1913.

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v UNITED STATES rngnn'r OFFICE. i

ERNEST L. GALE, SB", 01? YONKERS, NEW YORK, ASSIGNOR TO OTIS ELEVATORCOM- PANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION OF NEW JERSEY.

MOTOB-ACCELERATING DEVICE.

Specification of Letters Patent.

Patented June 10, 1913.

Application filed November 9, 1909. Serial No. 527,096.

To all whom it may concern:

Be it known that I, Ennns'r L. GALE, Six,

a citizen of the United States, residing at Yonkers, in the county ofWestchester and its objects the provision of practical, posiof the motoris desired.

tive and efiicient means for controlling the acceleration of alternatingcurrent motors used for operating elevators or for other purposes, andalso for accelerating direct current motors.

Generally speaking my invention consists of the combination ofmechanical with electrical means for effecting the acceleration ofalternating current motors.

Other objects of the invention and the various features of no-veltywillappear hereinafter.

The combinations of elements which are considered as new are set forthin the appended claims.

In the accorroanying drawings, Figures 1 and 2 illustrate the combinedelements used in my invention; Fig. 3 is a wiring diagram of electricalcircuits for a typical alternating current push-button elevator system,to gether with my invention. Although thearrangements of circuits hereinillustrated are based on an arrangement of an alternating currentpush-button elevator system of con trol, my invention could be readilyapplied to any system where automatic acceleration Referring to Fig. 2,a sprocket wheel 10 is keyed or otherwise securely fastened on the shaft1 and the latter is driven by means of the sprocket chain 11 (Fig. 3)and sprocket wheel 13 which is keyed on the winding drum shaft 12.Substantially mounted on the face of the drum 2 are the contacts a, b,

0,-a, b and c. Integral withv the drum 2 is a casing 2-0 which formssuitable supports for the spring 14 and pawl 5.

The stationary contacts A, B and C en gage with the contacts a, b and c,or a, b

and 0, depending on the direction of rotation of'the drum 2. The leads17 18 and 19 make connections from the stationary contacts C, B and. A,to. the accelerating magnet windings. A weight 44-for centering the drum2 is secured to the latter by the Y bracket 43.

In the casing 20, which 18 shown in sect on in Fig. 1, the pawl 5 isguided in the, slot 15 and is forced downwardly by the spring .60 14.The driving gear 3 is keyed or otherwise securely fastened to the shaft1, and engaged by the pawl 5 to rotate the drum 2. Y

A release disk 4 is free to rotate on the shaft 1 and is heldin positionby the pivthe pawl 5 out of engagement with the driv- 435 otecl bracket6 and level- 7, and serves to hold ing gear 3. A projection 24 on thedisk 4 fits tightly into the slot 25 and keeps the disk 4 from rotating.The cam surfaces 37 and 37 on the disk4 serve as positive knockouts forthe pawl 5, and oblong slot 21 in the disk 4 allows the latter'to lowerwhen the lever 7 is released by the weightedcore 1 i 29 of the automaticswitch-G being lifted,

thereby causing the spring-pressed pawl 5 to engage with the drivinggear 3 to rotate the drum 2. i

A primary mover rocking lever 7 is pivoted at 28 to the. bracket 8 and aslot 26 is provided in said lever through which the core rod 27 isadapted to pass. -A weight 28 secured to the lever 7 serves to insurethe lowering of the left-hand arm of the lever 7 when the weighted core29 of the automatic switch G is lifted, said weighted core'29 resting onthe knob 83 of the lever 7. A

cushion stop 30 for the lever 7, preferably made of rubber or someresilient materiahis substantially supported on the core rod 27.

The position of the cushion stop 30'1nay be ad]usted by means of a nut31' threaded on the'rod 27, a lock nut 31 also being provided. Securedto the bottomof the autoinatic switch core 29 is a weight 32 which restson the knob of the lever 7. It is seen that when the automatic switch GThe final accelerating magnet H is provided with the contacts 34 and 35which are adapted to.- complete a holding circuit for magnet H, whencontact 34 is moved upwardly by the core 36 to engage the contact 35.

The function and operation of the various even if the gear 0 parts shownin Figs. 1 and 2 will now be described.

Referring to Fig. 1, the final accelerating magnet H and the automaticswitch G are shown open, this being their normal posltion when the motoris ready to be started. The primary mover lever 7 is acted upon by theweighted core 29 of the automatic switch G at the knob 33, and holds thedisk 4 in its upward position with the bottom of its slot 21 in contactwith the shaft 1, likewise holding the pawl 511p and out of engagementwith the driving gear 3, so that 3 which is keyed to the shaft 1, isrotated, the drum 2 will not rotate. When the automatic switch winding77 is energized the weighted core 29 is drawn upwardly, therebyreleasing the lever 7 and allowing it to rock with the aid of the weight28. \Vhen this weight 28 rocks the lever 7, it lowers the disk 4 so thatthe top of the slotQl is against the shaft 1, thereby allowing thespring pressed pawl 5 to engage with the driving gear 3. A POSI- tiveconnection is now made for the drum 2, from the driven shaft 1, gear 3,pawl 5 and drum 2, and said drum is ready to be rotated when motorstarts. We will say the shaft 1 is rotated in a clockwise direction,looking at Fig. 2 in the direction of the arrows 3838. As the drum 2rotates, con tacts c and C will engage first thereby making a circuitfor the winding 39 of the first resistance cutout magnet. As the drumrotates further the contacts b and B will be brought together justbefore the contacts 0 and C are separated, thereby making the circuitfor the second resistance cut out winding 40 and then dropping the firstmagnet E. On further rotation of the drum, contacts a and A engage, andcontacts I) and-B will separate, thereby breaking the circuit for thesecond magnet F and making a circuit for the winding 41, which in thiscase is the last resistance cutout magnet H. When the circuit for thelast accelerating magnet H is closed, the contact 34 is operated by thecore 36 to engage with contact 35, to make a self-holding circuit forthemagnet H The last accelerating magnet His made self-holding so that whenthe pawl 5 is knocked out of engagement with the gear 3, therebyallowing the drum to center itself by means of the weight 44, thecircuit for the winding 41 will still be made when the cont-acts a. andA are disengaged. When the drum 2 has rotated far enough to make thecircuit for the final accelerating magnet H, the resistance now beingall cut out, it is evident that the drum should be reset to be in aposition to operate when the motor is again started. The resettingoporation is accomplished in the following manner :-VVhen the drum 2 hasrotated into position to bring the contacts a and A together, and closethe circuit for the magnet ll, the latter lifts its core, carrying withit the lever 7 and the disk 4. The disk 4 lifts the pawl 5 out ofengagement with the gear 3 and permits the drum to center itself bymeans of the centering weight '44. During this movement of the drum, thepawl 5 slides on the disk 4 and is thereby prevented from rccngaging thegear 3, the disk 4 being held up during such movement by the magnet II.It will be understood that the holding circuit through the contacts 34,35, maintains the magnet H energized at this time. The cam 37 maypartially retract the pawl 5 before the magnetH is excited. The cam mayof course be so formed that it will not be brought into position tooperate until after the circuit for the magnet H has been closed, orsaid cam may commence to lift the clutch member 5 earlier inthe rotationof the drum. The dropping of the automatic switch G also acts as aknockout for the pawl, in case of the elevator car not having traveledfar enough to effectthe operation of the last. accelerating magnet.\Vhen the automatic switch G drops the weighted core 29 strikes on theknob 33 of the lever 7, thereby causing the disk 4 to knock the pawl 5out of engagement with the driving gear 3, and allowing the drum 2 tocenter itself, in position to be operated again ,when the motor isoperated. It is to be noted tliht under certain circumstances I havethree different means for effecting the release of the pawl 5, but incase of the complete operation of the drum to effect the operation ofall the accelerating magnets, I claim the disk 4 as my positiveknockout.

Referring now to Fig. 3, I show my invention applied to an alternatingcurrent push button elevator system. It will not e necessary to go intodetails of the operation of'the various parts shown in the push buttonsystem, as it only repeats well known features which are used in atypical alternating current push button system. I will first designatethe parts shown in Fig. 3 which have not been described in Figs. 1 and2. The motor M receives current from the means, through the main lineswitch S, the reversin switch J or K, and the automatic switch Theacceleratingmagnets E, F and H are provided with suitable connectionsfrom the contact drum 2 and are adapted to short circuit'portions of thestarting comprises: hall push buttons d, d, d, car push buttons 0, e, e,car safety switch m, gate contact a, up floor controllers f, down floorcontrollers 9, door contacts k, h, h, floor magnets 70, 7c, is,non-interference magnets 45 and 46. The elevator car C may be driven byany suitable means, but in tlns instance I have shown a typical wormgeared elevator installation. A

resistance R. The elevator control system the ordinary manner. A support48 is provided for the slate board 47 upon which are .mounted variousmagnets and switches dia grammatically shown, and for the shaft 1 uponwhlch various parts shown 1n Figs. 1

and 2 are mounted. An electromagnetic brake B is connected to the mainleads of the motor M. A sprocket wheel 13 on the drum shaft 12 drivesthe sprocket wheel 10 by means of the chain 11. The limit switchesl andZ are located at'the upper and lower limit of travel of the elevator carC. r

The operation of the apparatus shown in Fig. 3 is as follows :The systemshown is arranged for three floors, but an installation for any numberof floors is. similarly arranged. As shown in Fig. 3 the car is at thesecond floor landing and the floor controller contacts f and 9 will bein position as shown when the car is at said landing. Now if it isdesired to go to the next floor above, the push button 0 in the car ispressed. This makes a circuit for the floor controller magnet is, whichcircuit may be traced as follows,from the main wire 84, throughconductors 49, 51, door contacts h, h, It, wire 43, gate contact n, carsafety switch m, wire 54, back contacts 56, 57, Wire 58, back contacts60, 59, wire 61, back contact 62 of the non-interference magnet 45, wire63, magnet traced also includes the relay magnet 46 and coil 64 'of therelay magnet 46, wire 65, car push button 6, wire 66, floor magnet la",Wire 67, contact 68, wire 69, contact 70, wire 71, floor controllerswitches 72, 73 and wire 74 to junction 75. This circuit being throughthe floor magnet 70, the latter is operated to brin the contacts 81 and80 together and estab ish a circuit through a reversing switch magnet aswill presently be pointed out. The push button circuit just the latteris operated to establish a circuit as follows: from the mains 84,through wires 49, 51, door contacts h, h, h, Wire 53, to junction 53,from thence through wire 52, noninterference magnet 45, contacts 68, 68,wire 69, contact 70, wire 71, floor controller switches 72, 73 and Wire74. This circuit includes the non-interference magnet 45, which operatesto separate the back contacts 62, and to engage the contacts 71, thusestablishing a self-holding circuit for the non-interference magnet 45,that is, the circuit from the junction 53 through the magnet 45 andcontacts 70, 70, independ- The non-interference magnet 45 havingseparated the contacts 62, there can be no interference from the operation of the landing push button switches d, d, d, as the circuit forthese switches is open at the contacts 62.

The operation of the floor magnet in establishes a circuit for themagnet of the brings reversing switch J as follows: from the main 84,through wires 49, 51, door contacts h", it, h, wire 53', contact a, carsafety switch m, wire 54, to junction 54, from thence through winding 76to the reversing switch J, wire 76, back contacts 60 on reversing switchK, wire 61, floor controller switch 73, wire 80, contacts 80, 81, floormagnet in, wires 67, 69, 71, switches 72, 73, wire 74, to junction. 75.The portion of this circuit between the junction 54 and the contact 81is in parallel with a like portion of the pushbutton circuit iuchidingthe back contacts 56, 57 and 59, 60, of the reversing switches, themagnet 64 and the pushbutton switch 0. The reversing switch magnet 7 6is therefore in parallel with the magnet 64 until the latter isdeenergized either, by releasing the pushbutton or by the opening of theback con tacts 5G, 57 on the reversing switch. The circuit through thereversing switch magnet 76 forms a holding circuit for the magnet 7c.The magnet 76 being energized, the reversing switch J closes'andestablishes a circuit for the potential switch G. The circuit for thewinding 77 is from the main wire 82, through the winding 77, Wire 83,limit switches Z and l, and wire 74 to the main wire 84. The main switchS, reversing switch J and potential switch G now beingclosed, complete acircuit to the stator of the motor M and to the brake B, and the motorstarts to rotate at slow speed, all of the starting resistance R beingin circuit with the rotor of the motor. The automatic switch G operatingto close its contacts, allows the weight 28 to lower the adjacent end ofthe lever 7, thereby lowering the disk 4 and releasing the pawl 5 toengage with the gear 3, thus making a positive connection for the drum2- to be rotated when the motor starts. We will say that when the car isgoing up the druin 2 will rotate in such a direction as to cause'thecontact 0 on the drum to engage with the stationary contact C, therebycompleting a circuit for the winding 39, from wire 84, through wire 16,contacts c and (J, Wire 17, winding 39, wire 42,

to motor lead 86. The coil 39 being energized causes the contact disk 85to engage with the contacts 79, 79 and 79, thereby short circuiting aportion of the starting resistance and increasing the speed of themotor. As the drum 2 continues to rotate it the contacts 7) and B intoengagement and completes a circuit for'the winding 40 from wire 84,through wire 16, contacts Z) and B wire 18, winding 40, wire 42 to motorlead 86, thereby short circuiting an additional portion of the startingresistance R and causing the motor to further increase its speed. Uponfurther rotation of the drum it engages contacts a and A, making acircuit for the winding 41, from wire 84, through wire 16, contacts aand A wire 19-,

winding 41, wire 42 to motor lead 86, thereby operating the lastaccelerating magnet H to short circuit thelast step of the resistance Rand allowing the motor to run at full normal speed. The drum 2, afterbeing rotated far enough to efi'ect the operation ot all the resistancecut-outs is released, either by the operation of the last acceleratingswitch 11 or by the cooperation there with of the cam surface 37 or 37of the disk 4 which ridesthe pawl 5 out of engagement with the gear 3 ashereinbefore, thereby allowing the drum 2 to center itself on the shaft1 ready to be operated when the motor is again started. It is to benoted that when the weight 44 causes the drum to center itself, thecontacts a and A are disengaged, thereby breaking the circuit for thelast accelerating magnet winding 41. But the magnet H is provided withthe contacts 34 and 35 which make a holding circuit for the winding 41,from wire 84, by means of Wires 10, 43, contacts 34, 35, winding 41,wire 42 to motor lead 86.

The magnet Hand the automatic switch G being co-acting parts for thelever 7, it is to be noted that when the magnet H is in its operativeposition, it acts as a hold-up for the lever 7 and its adjacent partsand when the car has reached the desired floor, the floor contacts f areautomatically operated to open the circuit for the reversing switch andfloor controller magnets, thereby breaking the circuit for the lastaccelerating ma gnet H and the winding 77 of the automatic switch G andcausing them to open. After the magnet H drops, it no longer acts ahold-up for the lever 7, but the automatic switch G now acts as ahold-up for the lever, by the weighted core 29 of the potential switchresting on the knob 33 of the lever. The reversing and automatic switchcontacts now being open,

cuts off the supply of current, and consequently the brake is applied,the motor is stopped, and the parts are ready to be operated when themotor is again started. The above operation is for the upward travel ofthe car, but the principle and operation of my invention will be thesame for the downward travel with the exception that thedrum 2 will berotated in the opposite direction.

While I have shown and described my invention as embodied in an electricelevator system and in a circuit controlling device, the same may have aw is application, further-- more it is obvious tiat variousmodifications could readily be made in the application herein shown anddescribed without departing from the spirit and scope of my invention,and for this reason I. desire not to, be

' limited to the precise construction and arrangement of parts asdisclosed.

What'Iclam as new and desire to have protected by Letters Patent of theUnited States is 1. The combination with an electric motor, ofaccelerating mechanism therefor comprising a cont-act drum, positivedriving connections between said drum and the motor, circuits controlledby said drum and controlling the operation of the acceleratingmechanism, and means for disconnecting the drum from the motor when theaccelerating mechanism has operated to accelerate the motor.

2. The combination of an electric motor, accelerating mechanismcomprising a contact carrying device controlling the acceler atingmechanism, positive means for operating said device during theacceleration of the motor, and means for automatically disconnectingsaid device from the motor.

3. The combination of an electric motor,

sectional starting resistance therefor, a contact device controllingshort circuits for the operation of the switches, gearing co1npris-- inga clutch between the said device an l..-' the motor, and means forautomatically opening the clutch after the operation of the saidswitches.

5. The combination of an electric motor, sectional starting resistance,a rotatable drum, switches operated by the rotation of the drum andcontrolling the startingresistance, a clutch forming a positive drivingconnection between the drum and the motor, and means for automaticallyoperating said clutch to disconnect the drum from the motor.

6. In combination, an electric motor, accelerating mechanism comprisinga me chanically operated device, gearing comprising a clutch bet-weenthe motor and said device, a switch in the maincircuit of the 1notor,and means operated by said switch tor controlling said clutch.

7. In combination, an electric motor, accelerating mechanism comprisinga mechanically operated device, gearing comprising a clutch between themotor and said device, a switch in the motor circuit, and an 8. Incombination, an electric motor, ac-

celerating mechanism comprising a contact drum, gearing com rising aclutch between the sald drum an the motor,- a potential switch, and apotential switch magnet controlling the operation ofsaid drum.

9. The combination of an electric motor, accelerating mechanismcomprising a mechanically operable device, a clutch between said deviceand the motor, a potential switch and magnet, and means controlled bysaid magnet to operate said clutch and disconmeet the said device fromthe motor when the potential switch is denergized.

10. The combination of an electric motor, accelerating mechanismcomprising a mechanically operable device, a potential switch andmagnet, and means operated by said-magnet to effect an operatingconmotion between said device and the motor when the-potential switchmagnet is energized.

11. In resistancecut-out mechanism, the combination of a rotatable drum,electrical contacts on the drum, means for rotating the drum, a devicefor engaging the drum with said rotating means, means for autoinatically disengaging the drum from said rotating means, sectionalresistance, fixed electrical contacts and connections, andelectro-rcsponsive devices actuated when the driimrotates and connectsthe contacts with the fixed contacts'and operative thereupon to shortcircuit portions of the sectional resistance.

12. The combination of an electric motor,

accelerating mechanism comprising a series of electromagnets, a deviceoperable to close circuits for said magnets in succession, drivingmechanismcompr smg a clutch between -the .motor and said device, andmeans operated by the last elcctroiiiagnet in said. 8011652 :to operatethe clutch and disconnect said device from the motor.

13. The combination of an electric motor, accelerating mechanismcomprising a series of accclerat'ing niagntits, a rotary contact"d'evi(-:e opeiable to successively clos c thc .circuits :for saidmagnets, a clutch forming a cpositive driving connection between said.de-

positive driving connection between saidcontact device and the motor,and positive means for disconnecting the clutch when said contactvdcvicehas been rotated through a predetermined angle.

' 15. Thc combination with an electric motor, of accelerating mechanismcomprising aseries of electromagnets, a contact drum controllingthe'circuits for said magnets driving connections between said drum amtthe motor comprising aclutch, means operated by,-.one of saidelectromagncts for disconnecting;theclutch, and a mechanical device forpbsitively disconnecting the clutch independently of said electromagnet.

16. The combination with an electric motor, of sectional startingresistance, switches for short-circuting said resistance, electromagnetsfor operating said switches, a rotary contact drum, contacts associatedtherewith and operable to close the circuits for the magnet windings ofsaid electromagnets in succession, driving connections between thecontact drumand the motor and comprising a switch, and a device operableby the last electromagnet of said series to disconnect the clutchmembers.'

17. The combination with a drivin shaft, a contact drum loosely mountedthereon, clutch members carriedby said drum and shaft respectively, anelectromagnet having a circuit controlled by said drum, and meansoperated by said electromagnet to diseo1 nect the clutch members.

18. The combination with a shaft, of a' net to disconnect the clutchmembersgand a device forming a positive means for disconnecting theclutch members independently of said electromagnet when the said contactdevice is rotated through a predetermined angle.

19. The combination of a drive shaft, a. contact ,(lllll'll looselymounted thereon, a clutch wheel secured to the shaft, a clutch membercarried by the contact drum and mo able into and out of, engagement withsaid clutch Wheel, and a stationary member i cooperating with saidclutch member to disengage itfrom said clutch wheel.

20. The combination with a drive shaft, of

a ontact drum mounted thereon, a clutch inciubcr secured to the shaft, aclutch membcr carried by the drum, a cam disk, an electlirimlg'nct, andmeans operated by said electi-ciuagnet to move said cam disk mtoposition to disengage the clutch members, saidcam disk being formed todisengage the clutch members independently of the electroiuagnet whenthe contact drum has reached a predetermined position.

21. The combination with an electric motor, of accelerating apparatuscomprising a rotatable contact carrying member and ascries ofaccelerating magnets, a driving connection between the motor and' saidcontact; carrying member comprising a clutch, means operated by one ofsaid electromagnets to disengage the clutch members, an electromagneticpotent ial switch, means operated by the potential switch magnet to holdthe clutch members disengaged while the potential switch is opened, andmeans independent of said magnets for disengaging the clutch memberswhen the contact drum is rotated in either direction from its normalposition.

22. The combination with an electric motor, of sectional startingresistance for the motor, resistance cut-out mechanism comprising arotatable drum, drum contacts,-

as the electro-magnets are energized, and

means for automatically returning the drum to its initial position.

at). T he. combination with an electric motor, of sectional startingresistance for the motor, resistance cut-out mechanism comprising arotating shaft, a contact drum free to rotate about the said shaft ineither direction, fixed electrical contacts arranged to correspond withthe drum contacts, mechanical means for rotating the contact drum in thesame direction as the shaft, elcctro-n'iagnets successively energized asthe contact drum is rotated, means for short circuiting sections of thestarting resistance as the electromagnet are energized, and automaticmeans for returning the contact drum to its initial position and holdingthe same stationary during the continued rotation of the said shaft.

24. The combination with an electric motor, of starting resistance forthe motor, resistance cut-out mechanism comprising a rotatable shaft,means for positively driving the shaft from the motor, a contact drumrotatably mounted on the shaft, fixed contacts to connectwith the drmncontacts when the drum is rotated, electro-magnets energized when thedrum is rotated, and a lever operative to permit the drum to rotate assoon as the motor is started.

25. The combination with an electric motor, of starting resistance forthe motor, resistance cut-out mechanism comprising a rotatable shaft,means for positively driving the shaft from the motor, a contact drumrotatably mounted on the shaft, fixed contacts to connect with the drumcontacts when the drum is rotated, electro-magnets encrgized when thedrum is rotated and operative to alter the starting resistance, and alever operative to effect the rotation of the drum as soon as the motoris started.

26. The combination with an electric motor, of starting resistance forthe motor, resistance cut-out mechanism comprising a rotatable shaft,means for positively driving the shaft from the motor, a contact. drumrotatably mounted on the shaft, fixed contacts to connect with the drumcontacts when the drum is rotated, electro-magnets energized when thedrum is rotated and operative to alter the starting resistance, and aweighted lever operative to permit the rotation of the drum as soon asthe motor is started.

27. The combination with an electric motor, of starting resistance forthe motor, re-

sistance cut-out mechanism comprising a 7 rotatable shaft, means forpositively driving the shaft from the motor, a contact drum rotatablymounted on the shaft, fixed contacts to connect with the drum contactswhen the drum is rotated, electro-magnets energized when the drum isrotated and operativeto alterthe starting resistance, a pivoted .lever,means operated by the lever for holding the drum disconnected from theshaft and electro-responsive devices oper- 30 at-ive to release thepivoted lever and thereby effect the rotation of the drum in accordancewith the shaft as soon as the motor is started.

28. The combination with an electric mo- 35 tor, of starting resistancefor the motor, resistance cutout mechanism comprising a rotatable shaft,a toothed wheel secured to the shaft, a drum rotatably mounted on theshaft, electrical contacts on the drum, fixed contacts to correspondtherewith, electromagnets energized when the drum rotates, and operativeto short-circuit portions of the res stance, a pivoted rocking lever,electromagnetic means for operating the said lever,

and mechanism operated by said lever to connect the drum with the shaftand cause the drum to rotate.

29. The combination with an electric motor, of starting resistance forthe motor,

resistance cut-out mechanism comprising a rotatable shaft, means forpositively driving the shaft, a contact drum rotatably mounted on theshaft, electro-magnets energized when the drum rotates andoperative toshort-circuit portions of the resistance, a pivoted rocking lever, meansassociatedwith the said lever for permitting the drum to be rotated bythe toothed wheel, and an ele'ctro-magnet operative to effect themovement of the lever when the motor starts.

30. The combination with an electric motor, of starting resistance forthe motor,

resistance cut-out mechanism comprising a rotatable shaft..a toothedwheel secured to the shaft, a drum rotatably mounted on the shaft,electrical contacts on the drum, fixed contacts to correspond therewith,electromaguets energized when the drum rotates and operative toshort-circuit portions of the resistance, a pivoted rocking lever, adisk mounted on the rotatable shaftand associated with the rockinglever, meatifdor engaging the toothed wheel to rotateithe' drum, andmeans for disengaging the riving resistance cut-out mechanism comprisinga rotatable shaft, means for positively driving the shaft, a contactdrum rotatably mounted on the shaft, elect-ro-magnets energized when thedrum rotates and operative to short-circuit portions of the resistance,a pivoted rocking lever, a disk formed with a slotted opening formounting the disk on .the rotatable shaft, means for engaging the drumwith the toothed wheel to rotate the drum, and means in connection withthe disk and the rocking lever for disengaging the drum from the toothedwheel.

33. The combination with an electric motor, of starting resistance forthe motor, resistance cut-out mechanism comprising a rotatable shaft,means for positively driving the shaft, a contact drum rotatably mountedon the shaft, electro-magnets energized When the drum rotates andoperative to short-circuit portions of the resistance, a toothed wheelconnected to the shaft, a pivoted rockirig lever, a device in connectionwith the contact drum operative to engage the toothed wheel to effectthe rotation of the drum, and means operable by said lever into and outof position to permit said device to engage the toothed wheel.

34. The combination with an electric motor, of starting resistancetherefor,- resistance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to short-circuit portions of the resistance, a lever,electro-responsive means for permittingthe lever to operate, means forengaging the toothed wheel to rotate the drum, and a disk operated bythe lever and effective to perlnit the rotation of the drum when thelever is operated in one direction.

35. The combination with an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to short-circuit portions of the resistance. a lever,clectroa'esponsive means for permitting the lever to operate, means forengaging the toothed wheel to rotate the drum and a disk operated by thelevcrand effective to permit the rotatlon of the drum and,

to prevent the rotation farther than a prcdetermined point. I

36. The combination with an electric motor, of starting resistancetherefor, resist ance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electromagnets energized in suc-' cession as the drumrot-ates and operative to short-circuit portions of the resistance, a.lever, electro-responsive means for permit;

ting the lever to operate, means for engaging the toothed wheel torotate thedrum, and a diskoperative to permit the engaging meanstorotate the contact drum, and said disk being provided with camprojections to effect the positive release of said engaging means.

37. The combination with an electric motor, of starting resistancetherefor, resist ance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, clectro-magnets energized in succession as the drum rotatesand operative to short-circuit portions of the resistance,

a lever, electro-responsive means for permitting the lever to operate,means for engaging the toothed wheel to rotate the drum,

and a. slotted disk vertically nu able and operative to permit theoperation of the saidengaging means, said disk being formed with camsurfaces for releasing the said engaging means when the drum has rotateda predetermined amount.

38. The combination with an electric motor, of starting resistancetherefor, resistance eut-out mechanism comprising a rotatable shaft, atoothed wheel secured tot-he shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to short-circuit. portions of the resistance, a lever (ElQCiIO-I'CSPOIlSlYQ means for permitting the, lever to operate, means forenga ing the toothed wheel to rotate the drum, ant a slotteddiskoperated by the lever to permit the operation of said engagingmeans. i

39. The combination with an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, clectro-magnets energized in. succession as the drum rotatesand operative to short-circuit portions of the resistance, a

lever, clectro-responsive means for permitting the lever to operate,means for engaging the toothed wheel to rotate the drum, a disk operatedby the lever to permit the operation of the drum rotaling1mans and toell'ect the release thereof when the drum has been rotated. and separatemeans for effecting the release of the drum rotating means.

40. The combinationWit-h an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as thedrum rotatesand operative to sl'iort-circuit portions of the resistance, a lever,electro-responsive means for permitting the lever to operate, means forengaging the toothed. wheel to rotate the drum, a slotteddisk-permittihg the operation of the tooth engaging means to rotate thedrum when the lever is operateld and preventing rotation of the drum furher than a given amount, and means for returning the drum to its initialposition after the drum has rotated the given amount.

41. The combination with an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to short-circuit portions of the resistance, a lever,electro-responsive means for permitting the lever to operate, means forengaging the toothed wheel to rotate the drum; a disk operated by thelever to. permit the engaging means to rotate the drum and to releasethe engaging means when the drum has beenrotated a predetermined amount,and electro-responsive means for effecting the release of the engagingmeans before the drum has been'rotated the predetermined amount.

42. The combination with an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a rotatable shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to i short-circuit portions of the resistance, a lever,elcctro-responsive means for permitting the lever to operate, means forengaging the cut-out mechanism comprising a rotatable,

sha ft, a toothed wheel secured to the shaft, a contact drum rotatablymounted on the l't. electro-magnets energized in succes Wm as the/drumrotates and operative to --nortseircuit portions of the resistance, a

lever, electro-responsive .means for permitting the lever to operate,means for engaging the toothed Wheel to rotate the drum, a disk operatedby the lever to permit the engaging means to rotate the drum and torelease the engaging means when the drum has been rotated apredetermined amount, electro-responsive means for effecting the releaseof the engaging means before the drum has beenrotatcd the predeterminedamount, a weight for returning the drum to itsinitial position wheneverthe engaging means has been released, and means for antoi'naticallyreturning the lever to its unoperated position.

t-ft. The combination with an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a r0- tatahle shaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to short-circuit portions of the resistance, a weightedlever, an electro-magnet to release the-lever when it is energized, apawl for engaging the toothed Wheel to rotate the drum, means operatedby the lever to permit the engaging of the pawl and to disengage thesame at a predetermined time, and an auxiliary contact for closing aretaining circuit through the last shortcircuiting magnet as long as theelectro-magnet which releases the weighted lever is energized.

45. The combination with an electric motor, of starting resistancetherefor, re-

sistance cut-out meclianism comprising a rotatable shaft, a toothedwheel secured to the shaft, :1 contact drum rotatably mounted on theshaft, electr'o-magnets energized'in succession as the drum rotates andoperative to short-circuit portions of the resistance, a weighted lever,an electro-magnet at one end of the lever to release the lever when thema gnet is energized,means for engaging the toothed wheel to rotate thedrum, a cam shaped disk operated by the lever to permit the operation ofthe engaging means and to disengage the same at a predetermined time,and means in connection with the last short-circuiting magnet forreleasing the said engaging means as soon as the-said magnet isenergized.

46. The combination with an electric motor, of starting resistancetherefor, resistance rut-out mechanism comprising a retatable shaft, atoothed wheel secured to the shaft. a contact drum rotatably mounted ontheshaft, electro-magnets energized in succession as the drum rotatesand operative to short-circuit portions of the resistance, a weigh tedlever, an electro-magnct at one end of the lever to release theleverwhen the magnet is energized,- means for engaging the toothed \vl'icelto rotate the drum, a camshaped disk operated by the lever to permit.short-circuiting ma 'the operation of the engaging means and todisengage the same at a predetermined time, and means in connection'withthe last shortcircuiting-magnet for lifting the lever to release theengaging means as soon as the said magnet is energized.

Y 47. The combination with an electric motor, of starting resistancetherefor, resistance cut-out mechanism comprising a r'otatableshaft, atoothed wheel secured to the shaft, a contact drum rotatably mounted onthe shaft, electro-magnets energized in succession as the drum rotatesand operative to shortcircuit portions of the resisttime; a weightedlever, an electro-magnet at one end of the lever to release the leverwhen the magnet is energized, means for engaging the toothed wheel torotate the drum, a cam-shaped disk operated by the lever to permit theoperation of the engaging means, a rod in connection with the last etoperative to raise the lever and release t e said engaging means,

and means for maintaining the circuit for the said last short-circuitingmagnet independently of the. position of the drum and there by holdingthe lever in said raised position I after the said engaging means hasbeen rev leased.

l8. The combination with a motor, of motor accelerating mechanismcomprising arotatable contact drum, mechanical con nections between themotor and contact drum for effecting the rotation of the latter, anautomatic switch, sectional starting resistance for the motor,accelerating magnets, their windings having one common terminalconnection through the switch, and electrical circuits closed and openedthrough the saidcontact drum connecting the accelerating magnet windingswith the main line in regular succession to effect the oper ation of thesaid magnets to short-circuit portions of the sectional resistance.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

ERNEST L. GALE, sR.

Witnesses Aenn' W. FLAGG, C. H. AREUT.

